Can you use existing memory modules to upgrade to the maximum amount of supported memory?

Yes, you can use existing memory modules to upgrade to the maximum supported memory, provided that the new modules are compatible with your system's specifications. It's important to check the motherboard’s documentation for supported RAM types, speeds, and configurations. However, mixing different brands or speeds may lead to instability or reduced performance, so it's often best to use matched pairs. Always ensure that the total memory configuration adheres to the limits set by the manufacturer.